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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37d54fda0881ae1171d30ed1d72765f6c074591062548c44b0f35f84edc126c5' 
  AND token = 'AL5LX/5d/5WPjhXWadkxqCg16b5ZEhohbNGbmcb5E7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}